
% constants
RADIAL     = 1;
SPIRAL     = 2;
LOG_SPIRAL = 3;
LIM_ANGLE  = 4;
SPHERICAL  = 5;
COMPLETE   = 6;
RAND_LINES = 7;
RAND_PTS   = 8;
LOW_PASS   = 9;
HELICAL    = 10;
TRAJ = {'RADIAL', 'SPIRAL', 'LOG_SPIRAL', 'LIM_ANGLE', 'SPHERICAL', 'COMPLETE'};

BRAINWEB   = 1;
SHEPPLOGAN = 2;
DATA = {'BRAINWEB','SHEPP-LOGAN'};

REAL    = 1;
COMPLEX = 2;
OBS     = {'REAL','COMPLEX'};

NONE  = 0;
TEXT  = 1;
IMAGE = 2;
